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Shoreline Change around a River Delta on the Cox’s Bazar Coast of Bangladesh
http://hdl.handle.net/2241/00157321
http://hdl.handle.net/2241/0015732121be91b2-01f1-460a-83bf-f10ce1e1ce02
名前 / ファイル | ライセンス | アクション |
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JMSE_6-3 (2.9 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-08-09 | |||||
タイトル | ||||||
タイトル | Shoreline Change around a River Delta on the Cox’s Bazar Coast of Bangladesh | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
武若, 聡
× 武若, 聡× Mahamud, Upal |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A recent erosional problem around a river delta on the Cox’s Bazar coast was analyzed in this study. The coastline extends from south to north. Rapid erosion has affected some portions of a 24-km road along the coast, and local authorities have attempted to protect the road via revetment. However, the structure was soon buried with sediment because of a growing sand spit along the river delta, and a new area was eroded. Shoreline positions for a 44-year (1972–2016) period were digitized using Landsat images. From the time stack images, we observed a sand spit growing in a northward direction from 2000 to 2015, and the adjacent erosion area extended in the same direction. We employed a numerical model (MIKE21FM SM) for the computation of wave-driven currents and sediment transport along the coast, and attempted to reproduce recent erosional processes. The numerical result shows that net littoral drift is dominant in the northward direction along the coast, which is the same direction of the spit growth observed in the satellite images. A higher amplitude spit induces higher sediment transport compared to a low amplitude spit because of the difference in local incident wave angles resulting in greater positive gradient of the longshore sediment flux distribution, causing erosion in the downcoast. | |||||
書誌情報 |
Journal of Marine Science and Engineering 巻 6, 号 3, p. 80, 発行日 2018-07 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2077-1312 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.3390/jmse6030080 | |||||
権利 | ||||||
権利情報 | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | MDPI |